Once per
combat round as a move action (or once a minute outside of combat), a
shielded channeler may make an additional Will save against the shield
weave being held against them. If the weave is maintained, the Will save
has a –4 circumstance penalty, and a tied-off weave has a –2
circumstance penalty to the save. Failure means that the character did
not break the shield and cannot access the One Power.